package org.malred.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import lombok.extern.slf4j.Slf4j;
import org.malred.common.CustomException;
import org.malred.dto.SetmealDto;
import org.malred.entity.Setmeal;
import org.malred.entity.SetmealDish;
import org.malred.mapper.SetmealMapper;
import org.malred.service.SetmealDishService;
import org.malred.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.stream.Collectors;

@Slf4j
@Service
public class SetmealServiceImpl extends ServiceImpl<SetmealMapper, Setmeal> implements SetmealService {

    @Autowired
    private SetmealDishService setmealDishService;

    @Override
    @Transactional
    public void saveWithDish(SetmealDto setmealDto) {
        // 保存套餐的基本信息, 操作setmeal, 执行insert操作
        this.save(setmealDto);

        List<SetmealDish> setmealDishes = setmealDto.getSetmealDishes();
        setmealDishes = setmealDishes.stream().map((item) -> {
            item.setSetmealId(setmealDto.getId());
            return item;
        }).collect(Collectors.toList());

        // 保存套餐和菜品的关联信息, 操作setmeal_dish, 执行insert操作
        setmealDishService.saveBatch(setmealDishes);
    }

    @Override
    @Transactional
    public void removeWithDish(List<Long> ids) {
        // 查询套餐状态, 确定是否可用删除
        LambdaQueryWrapper<Setmeal> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.in(Setmeal::getId, ids);
        queryWrapper.eq(Setmeal::getStatus, 1);

        int count = this.count(queryWrapper);
        if (count > 0) {
            throw new CustomException("套餐正在售卖中, 不能删除");
        }

        // 如果可以删除, 先删除套餐表中的数据 - setmeal
        this.removeByIds(ids);
        // 删除关系表中的数据 - setmeal_dish
        LambdaQueryWrapper<SetmealDish> lambdaQueryWrapper = new LambdaQueryWrapper<>();
        lambdaQueryWrapper.in(SetmealDish::getSetmealId, ids);
        setmealDishService.remove(lambdaQueryWrapper);
    }

    @Override
    public void updateStatus(List<Long> ids,Integer status) {
        List<Setmeal> setmeals = this.listByIds(ids);
        setmeals = setmeals.stream().map((item) -> {
            item.setStatus(status);
            return item;
        }).collect(Collectors.toList());
        this.updateBatchById(setmeals);
    }
}
